fix: display framework version on bootstrapped component (#13252)

modules/@angular/router/src/index.ts

@@ -21,5 +21,5 @@ export {ActivatedRoute, ActivatedRouteSnapshot, RouterState, RouterStateSnapshot
 export {PRIMARY_OUTLET, Params} from './shared';
 export {UrlHandlingStrategy} from './url_handling_strategy';
 export {DefaultUrlSerializer, UrlSegment, UrlSegmentGroup, UrlSerializer, UrlTree} from './url_tree';
-
+export {VERSION} from './version';
 export * from './private_export'

modules/@angular/router/src/version.ts

@@ -0,0 +1,19 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+/**
+ * @module
+ * @description
+ * Entry point for all public APIs of the common package.
+ */
+
+import {Version} from '@angular/core';
+/**
+ * @stable
+ */
+export const VERSION = new Version('0.0.0-ROUTERPLACEHOLDER');